[grahamburger]

That's the big question, isn't it? The follow up is always "sure, but how do we know that the reason women aren't interested in tech is because it's perceived as a 'guy thing?'" Nature vs. nurture, and the reality is despite all of our hand-wringing we just don't know. But we do know that there are identifiable biases in our industry (and others) and we should address those regardless of the outcome.